Idiopathic recurrent myoglobinuria and persistent weakness

Abstract
The case of an adolescent with idiopathic recurrent myoglobinuria is reported. The following features are emphasized: (1) persistence of limb weakness and elevated CK levels between the attacks, (2) a constant myopathic pattern in EMG, and (3) chronic morphologic abnormalities of myopathy in two muscle biopsies. All known causes of myoglobinuria were investigated and ruled out.

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